1 files changed, 63 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/ia32/CpuId.s b/MdePkg/Library/BaseLib/ia32/CpuId.s
new file mode 100644
index 0000000000..989daba127
--- /dev/null
+++ b/MdePkg/Library/BaseLib/ia32/CpuId.s
@@ -0,0 +1,63 @@
+#------------------------------------------------------------------------------
+#
+# Copyright (c) 2006, Intel Corporation
+# All rights reserved. This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution.  The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+# Module Name:
+#
+#   CpuId.Asm
+#
+# Abstract:
+#
+#   AsmCpuid function
+#
+# Notes:
+#
+#------------------------------------------------------------------------------
+
+
+
+
+#------------------------------------------------------------------------------
+#  VOID
+#  EFIAPI
+#  AsmCpuid (
+#    IN   UINT32  RegisterInEax,
+#    OUT  UINT32  *RegisterOutEax  OPTIONAL,
+#    OUT  UINT32  *RegisterOutEbx  OPTIONAL,
+#    OUT  UINT32  *RegisterOutEcx  OPTIONAL,
+#    OUT  UINT32  *RegisterOutEdx  OPTIONAL
+#    )
+#------------------------------------------------------------------------------
+.globl _AsmCpuid
+_AsmCpuid:
+    push   %ebx
+    push   %edi
+    movl    12(%esp),%eax
+    cpuid
+    movl    %ecx,%edi
+    movl    16(%esp),%ecx
+    jecxz   L1
+    movl    %eax,(%ecx)
+L1:
+    movl    20(%esp),%ecx
+    jecxz   L2
+    movl    %ebx,(%ecx)
+L2:
+    movl    24(%esp),%ecx
+    jecxz   L3
+    movl    %edi,(%ecx)
+L3:
+    movl    28(%esp),%ecx
+    jecxz   L4
+    movl    %edx,(%ecx)
+L4:
+    pop    %edi
+    pop    %ebx
+    ret